With over 5.2 million participants worldwide, the project is the distributed computing project with the most participants to date. The original intent of SETI@home was to utilize 50,000-100,000 home computers.[11] Since its launch on May 17, 1999, the project has logged over two million years of aggregate computing time[when?]. On September 26, 2001, SETI@home had performed a total of 1021 floating point operations. It is acknowledged by the Guinness World Records as the largest computation in history.[18] With over 278,832 active computers in the system (2.4 million total) in 234 countries, as of November 14, 2009, SETI@home has the ability to compute over 769 teraFLOPS.[19] For comparison, the K computer, which as of June 20, 2011 was the world's fastest supercomputer, achieved 8.162 petaFLOPS.